US20010031201A1 - Abradable seals - Google Patents
Abradable seals Download PDFInfo
- Publication number
- US20010031201A1 US20010031201A1 US09/815,041 US81504101A US2001031201A1 US 20010031201 A1 US20010031201 A1 US 20010031201A1 US 81504101 A US81504101 A US 81504101A US 2001031201 A1 US2001031201 A1 US 2001031201A1
- Authority
- US
- United States
- Prior art keywords
- sealing element
- walls
- element according
- radially inner
- radially
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
- B23H9/10—Working turbine blades or nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
- F01D11/12—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/445—Free-space packings with means for adjusting the clearance
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49297—Seal or packing making
Definitions
- the invention relates to an abradable seal for a gas turbine engine.
- a sealing structure which may comprise an annular seal or a seal segment ring made up of a plurality of arc shaped seal segments. Because the turbine blades expand and contract as their temperatures vary in use and centrifugal loads are imposed upon them, it is normal to provide a small gap between the turbine blade tips and the seal, to allow for this fluctuation.
- abradable seals for sealing between the turbine blade tips and the sealing structure. This enables the tips of the turbine blades to wear away the seal to an optimum size and shape without causing damage to the turbine blade tips.
- abradable seals may consist of an open cell foil honeycomb which is brazed in place and subsequently filled with a suitable abradable material, such as a metallic powder.
- the foil honeycomb acts as a support for the abradable material and the abradable material and the supporting foil honeycomb is subsequently partially worn away by the rotating turbine blades, thus forming a seal.
- seals may suffer from progressive oxidation attack if the foil material has inadequate oxidation resistance.
- problems may be experienced with the brazed joints, and the seals may be difficult to cool.
- a sealing element for positioning radially outwardly of at least some of the aerofoil blades of a gas turbine engine, a radially inner surface region of the sealing element including an integrally formed seal structure comprising a plurality of inwardly projecting walls.
- the sealing element may comprise or form part of a generally annular housing for surrounding the tips of the blades of the turbine of said engine.
- the sealing element may comprise a seal segment.
- the walls project substantially radially inwardly.
- radially inner edges of the walls define a substantially arc shaped inner face of the sealing element.
- the seal structure is provided over substantially the whole of a radially inner surface region of the sealing element.
- the thickness of the walls may reduce generally towards their radially inner edges.
- the walls may be shaped to form a plurality of radially open cells and each cell may be open only at a radially inner side.
- One or more of the cells may be substantially diamond shaped when viewed in the radial direction.
- the cells may be all substantially the same size or may be different sizes.
- the thickness of the walls may increase at their radially inner edges, such that the size of the cells reduces at their open radially inner sides.
- a sealing element as defined in any of the preceding four paragraphs, wherein openings between the walls are at least partially filled with an abradable sealing material.
- the abradable sealing material may protrude radially inwardly beyond radially inner edges of the walls.
- the walls may be abradable.
- abradable it is meant that the material may be worn away by contact with the tips of rotating aerofoil blades, without causing significant damage to the blade tips.
- seal segment ring for a turbine of a gas turbine engine, the seal segment ring including a plurality of sealing elements as defined in any of the preceding nine paragraphs.
- a gas turbine engine including a turbine comprising a seal segment ring as defined in the preceding paragraph.
- the turbine may be the high pressure turbine of the gas turbine engine.
- a sealing element for positioning radially outwardly of at least some of the aerofoil blades of a gas turbine engine, the method including the step of integrally forming in a radially inner surface region of the seal segment a seal structure comprising a plurality of radially inwardly projecting walls.
- the projecting walls may be formed by electro-discharge machining.
- the method may include the step of machining the walls using an electrode having a generally complementary shape to at least a part of the seal structure.
- the method may include the step of manufacturing the electrode by machining the electrode to a generally desired radial profile and subsequently wire cutting grooves into the electrode, the grooves being for subsequently forming the walls of the seal structure.
- the method may include the step of integrally casting the walls into the sealing element.
- the method includes the further step of electro-chemically machining or etching the seal structure to reduce the thickness of the cast walls.
- FIG. 1 is a schematic diagram of a ducted fan gas turbine engine
- FIG. 2 is a diagrammatic section through a turbine seal segment according to the invention.
- FIG. 3 is a diagrammatic view in the direction of the arrow Y in FIG. 2;
- FIG. 4 is a diagrammatic section on the line X-X in FIG. 3;
- FIG. 5 is a diagrammatic partial detail of a cell structure of a turbine seal segment according to the invention.
- FIG. 6 is a diagrammatic section through an alternative turbine seal segment according to the invention.
- FIG. 7 is a diagrammatic view in the direction of the arrow x in FIG. 6.
- a ducted fan gas turbine engine generally indicated at 10 comprises, in axial flow series, an air intake 12 , a propulsive fan 14 , an intermediate pressure compressor 16 , a high pressure compressor 18 , combustion equipment 20 , a high pressure turbine 22 , an intermediate pressure turbine 24 , a low pressure turbine 26 and an exhaust nozzle 28 .
- the gas turbine engine 10 works in the conventional manner so that air entering the intake 12 is accelerated by the fan 14 to produce two air flows, a first air flow into the intermediate pressure compressor 16 and a second airflow which provides propulsive thrust.
- the intermediate pressure compressor 16 compresses the air flow directed into it before delivering the air to the high pressure compressor 18 where further compression takes place.
- the compressed air exhausted from the high pressure compressor 18 is directed into the combustion equipment 20 where it is mixed with fuel and the mixture combusted.
- the resultant hot combustion products then expand through and thereby drive the high, intermediate and low pressure turbines 22 , 24 and 26 before being exhausted through the nozzle 28 to provide additional propulsive thrust.
- the high, intermediate and low pressure turbines 22 , 24 and 26 respectively drive the high and intermediate pressure compressors 16 and 18 and the fan 14 by suitable interconnecting shafts.
- FIGS. 2 to 4 illustrates a turbine seal segment 30 for the high pressure turbine 22 .
- a plurality of arc shaped sealing elements in the form of a turbine seal segment together form a substantially cylindrical seal segment ring which encases the rotating high pressure turbine blades 32 (see FIG. 2).
- a small gap 34 is provided between the tips 36 of the turbine blades 32 and a radially inner surface 33 of the seal segment 30 .
- the size of the gap 34 varies with time for various reasons, including variations in the temperatures of the turbine blades 32 and other components.
- an open cell structure 38 is formed integrally with the turbine seal segment 30 in the region of its radially inner surface 33 .
- the open cell structure 38 includes upstanding walls 40 which project radially inwardly.
- the walls 40 define therebetween a plurality of open cells 44 , the cells 44 having generally circumferential bases 42 .
- the cells 44 are able to receive and support an abradable material such as a metallic powder.
- the cells 44 are generally diamond shaped when viewed in the radial direction of the turbine and the walls are oriented at about 30° to the axial direction of the turbine, in use.
- a first set of generally parallel walls crosses over and intersects a second set of generally parallel walls to form the diamond shaped cells 44 .
- the walls 40 may project about 1 mm to 3 mm radially inwardly of the surface 42 .
- the width of the walls 40 is about 0.2 mm to 0.3 mm and the generally parallel walls are located about 2 mm to 2.5 mm apart.
- the walls are generally rectangular in section.
- Cooling channels 45 are provided within the seal segment 30 , radially outwardly of the cell structure 38 . Air flowing through the cooling channels helps to cool the cell structure 38 and any abradable material located therein.
- the open cell structure 38 may be formed by electro-discharge machining, using an electrode having a generally complementary shape to the structure to be formed on the turbine seal segment.
- the electrode may be manufactured by machining to the required radial profile and subsequently wire cutting to produce a series of grooves in the pattern of the walls required in the open cell structure.
- the electrode may then be used to machine the open cells 44 in the seal segment 30 , the grooves formed by wire cutting the electrode producing the upstanding walls 40 of the open cell structure 38 . Radially inner edges of the walls may subsequently be machined to a desired profile.
- the surfaces of the cells 44 may be nickel plated, and the cells may subsequently be filled with the abradable material. In use the blade tips of the high pressure turbine blades wear away the abradable material and the walls 40 . Alternatively, the cells may be overfilled, such that the abradable material projects radially inwardly beyond the radially inner edges of the walls 40 .
- the open cell structure 38 acts as a retention system for the abradable material, thus minimising damage to the walls 40 and facilitating repair of the structure.
- the abradable material may include a metallic powder, which may be hardened and sintered. Alternatively materials such as ceramic powders might be used.
- the above described embodiment thus provides a turbine seal segment which overcomes many of the problems associated with the prior art.
- the depth of the abradable material may be reduced since extra depth to accommodate wicked braze material is not required.
- the walls of the open cell structure have a relatively high oxidation resistance and are easily cooled because they are positioned near to the cooling channels 45 .
- FIGS. 6 and 7 illustrate an alternative embodiment of the invention, in which corresponding reference numerals are used for equivalent parts.
- the open cell structure 38 includes upstanding walls 40 which define therebetween a plurality of cells.
- a small number of generally diamond shaped cells 44 are located at the outer edges of the seal segment.
- the majority of the cells 144 form elongate rhomboid shapes when viewed in the radial direction of the turbine.
- the section of the walls illustrated is generally rectangular. However, an “Eiffel tower” section may be used, to improve cooling. In this embodiment, the width of the walls is increased towards their bases, thus providing improved transfer of heat to the cooling channels 45 .
- the width of the walls may however be somewhat increased at their radially inner edges, forming a reentrant shape, thus helping to prevent abradable material from becoming detached from the cell structure.
- the open cells need not be diamond or rhomboid shaped, but for example be rectangular, triangular, etc.
- the cells may be discrete as illustrated, or may interconnect with one another.
- a plurality of closely spaced walls or rails, which may be parallel, may form a seal structure.
- the seal structure may act as a retention matrix for abradable material as described above, or may itself form the seal, with no additional sealing material being used.
- the seal structure need not be formed by electro-discharge machining. Instead, for example, the structure may be cast integrally into the seal segment.
- electrochemical machining or etching may be used to reduce the thickness of the walls in the sealing structure.
Abstract
Description
- The invention relates to an abradable seal for a gas turbine engine.
- In gas turbine engines, some of the aerofoil blades and in particular the turbine blades are conventionally surrounded by a sealing structure, which may comprise an annular seal or a seal segment ring made up of a plurality of arc shaped seal segments. Because the turbine blades expand and contract as their temperatures vary in use and centrifugal loads are imposed upon them, it is normal to provide a small gap between the turbine blade tips and the seal, to allow for this fluctuation.
- It is known to provide an abradable seal for sealing between the turbine blade tips and the sealing structure. This enables the tips of the turbine blades to wear away the seal to an optimum size and shape without causing damage to the turbine blade tips. Such abradable seals may consist of an open cell foil honeycomb which is brazed in place and subsequently filled with a suitable abradable material, such as a metallic powder. The foil honeycomb acts as a support for the abradable material and the abradable material and the supporting foil honeycomb is subsequently partially worn away by the rotating turbine blades, thus forming a seal.
- Certain problems are associated with the above seals. The seals may suffer from progressive oxidation attack if the foil material has inadequate oxidation resistance. In addition, problems may be experienced with the brazed joints, and the seals may be difficult to cool.
- According to the invention, there is provided a sealing element for positioning radially outwardly of at least some of the aerofoil blades of a gas turbine engine, a radially inner surface region of the sealing element including an integrally formed seal structure comprising a plurality of inwardly projecting walls.
- The sealing element may comprise or form part of a generally annular housing for surrounding the tips of the blades of the turbine of said engine. The sealing element may comprise a seal segment.
- Preferably the walls project substantially radially inwardly.
- Preferably radially inner edges of the walls define a substantially arc shaped inner face of the sealing element.
- Preferably the seal structure is provided over substantially the whole of a radially inner surface region of the sealing element.
- The thickness of the walls may reduce generally towards their radially inner edges.
- The walls may be shaped to form a plurality of radially open cells and each cell may be open only at a radially inner side. One or more of the cells may be substantially diamond shaped when viewed in the radial direction. The cells may be all substantially the same size or may be different sizes. The thickness of the walls may increase at their radially inner edges, such that the size of the cells reduces at their open radially inner sides.
- According to the invention there is further provided a sealing element as defined in any of the preceding four paragraphs, wherein openings between the walls are at least partially filled with an abradable sealing material. The abradable sealing material may protrude radially inwardly beyond radially inner edges of the walls.
- The walls may be abradable. By “abradable” it is meant that the material may be worn away by contact with the tips of rotating aerofoil blades, without causing significant damage to the blade tips.
- According to the invention there is further provided a seal segment ring for a turbine of a gas turbine engine, the seal segment ring including a plurality of sealing elements as defined in any of the preceding nine paragraphs.
- According to the invention there is further provided a gas turbine engine including a turbine comprising a seal segment ring as defined in the preceding paragraph. The turbine may be the high pressure turbine of the gas turbine engine.
- According to the invention there is further provided a method of manufacturing a sealing element for positioning radially outwardly of at least some of the aerofoil blades of a gas turbine engine, the method including the step of integrally forming in a radially inner surface region of the seal segment a seal structure comprising a plurality of radially inwardly projecting walls.
- The projecting walls may be formed by electro-discharge machining. The method may include the step of machining the walls using an electrode having a generally complementary shape to at least a part of the seal structure.
- The method may include the step of manufacturing the electrode by machining the electrode to a generally desired radial profile and subsequently wire cutting grooves into the electrode, the grooves being for subsequently forming the walls of the seal structure.
- As an alternative to electro-discharge machining, the method may include the step of integrally casting the walls into the sealing element. Preferably the method includes the further step of electro-chemically machining or etching the seal structure to reduce the thickness of the cast walls.
- An embodiment of the invention will be described for the purpose of illustration only, with reference to the accompanying drawings in which:
- FIG. 1 is a schematic diagram of a ducted fan gas turbine engine;
- FIG. 2 is a diagrammatic section through a turbine seal segment according to the invention;
- FIG. 3 is a diagrammatic view in the direction of the arrow Y in FIG. 2;
- FIG. 4 is a diagrammatic section on the line X-X in FIG. 3;
- FIG. 5 is a diagrammatic partial detail of a cell structure of a turbine seal segment according to the invention;
- FIG. 6 is a diagrammatic section through an alternative turbine seal segment according to the invention; and
- FIG. 7 is a diagrammatic view in the direction of the arrow x in FIG. 6.
- With reference to FIG. 1 a ducted fan gas turbine engine generally indicated at10 comprises, in axial flow series, an
air intake 12, apropulsive fan 14, anintermediate pressure compressor 16, ahigh pressure compressor 18,combustion equipment 20, ahigh pressure turbine 22, anintermediate pressure turbine 24, alow pressure turbine 26 and anexhaust nozzle 28. - The
gas turbine engine 10 works in the conventional manner so that air entering theintake 12 is accelerated by thefan 14 to produce two air flows, a first air flow into theintermediate pressure compressor 16 and a second airflow which provides propulsive thrust. Theintermediate pressure compressor 16 compresses the air flow directed into it before delivering the air to thehigh pressure compressor 18 where further compression takes place. - The compressed air exhausted from the
high pressure compressor 18 is directed into thecombustion equipment 20 where it is mixed with fuel and the mixture combusted. The resultant hot combustion products then expand through and thereby drive the high, intermediate andlow pressure turbines nozzle 28 to provide additional propulsive thrust. The high, intermediate andlow pressure turbines intermediate pressure compressors fan 14 by suitable interconnecting shafts. - FIGS.2 to 4 illustrates a
turbine seal segment 30 for thehigh pressure turbine 22. A plurality of arc shaped sealing elements in the form of a turbine seal segment together form a substantially cylindrical seal segment ring which encases the rotating high pressure turbine blades 32 (see FIG. 2). Asmall gap 34 is provided between thetips 36 of theturbine blades 32 and a radiallyinner surface 33 of theseal segment 30. The size of thegap 34 varies with time for various reasons, including variations in the temperatures of theturbine blades 32 and other components. - It is known to provide a coating of an abradable material on an inner surface of the casing, the abradable material being partially worn away by the
tips 36 of theturbine blades 32. Conventionally, a foil open cell honeycomb is brazed onto the inner surface of the seal segment and filled with an abradable material such as a metallic powder. - Referring to the figures, according to an embodiment of the invention, an
open cell structure 38 is formed integrally with theturbine seal segment 30 in the region of its radiallyinner surface 33. Theopen cell structure 38 includesupstanding walls 40 which project radially inwardly. Thewalls 40 define therebetween a plurality ofopen cells 44, thecells 44 having generallycircumferential bases 42. Thecells 44 are able to receive and support an abradable material such as a metallic powder. - In the illustrated example, the
cells 44 are generally diamond shaped when viewed in the radial direction of the turbine and the walls are oriented at about 30° to the axial direction of the turbine, in use. A first set of generally parallel walls crosses over and intersects a second set of generally parallel walls to form the diamondshaped cells 44. - The
walls 40 may project about 1 mm to 3 mm radially inwardly of thesurface 42. The width of thewalls 40 is about 0.2 mm to 0.3 mm and the generally parallel walls are located about 2 mm to 2.5 mm apart. In the example illustrated, the walls are generally rectangular in section. -
Cooling channels 45 are provided within theseal segment 30, radially outwardly of thecell structure 38. Air flowing through the cooling channels helps to cool thecell structure 38 and any abradable material located therein. - The
open cell structure 38 may be formed by electro-discharge machining, using an electrode having a generally complementary shape to the structure to be formed on the turbine seal segment. The electrode may be manufactured by machining to the required radial profile and subsequently wire cutting to produce a series of grooves in the pattern of the walls required in the open cell structure. - The electrode may then be used to machine the
open cells 44 in theseal segment 30, the grooves formed by wire cutting the electrode producing theupstanding walls 40 of theopen cell structure 38. Radially inner edges of the walls may subsequently be machined to a desired profile. The surfaces of thecells 44 may be nickel plated, and the cells may subsequently be filled with the abradable material. In use the blade tips of the high pressure turbine blades wear away the abradable material and thewalls 40. Alternatively, the cells may be overfilled, such that the abradable material projects radially inwardly beyond the radially inner edges of thewalls 40. In this case, theopen cell structure 38 acts as a retention system for the abradable material, thus minimising damage to thewalls 40 and facilitating repair of the structure. - The abradable material may include a metallic powder, which may be hardened and sintered. Alternatively materials such as ceramic powders might be used.
- The above described embodiment thus provides a turbine seal segment which overcomes many of the problems associated with the prior art. There is no brazed joint between the open cell structure and the remainder of the seal segment and thus no possibility of the open cell structure becoming detached from the casing. In addition, the depth of the abradable material may be reduced since extra depth to accommodate wicked braze material is not required. The walls of the open cell structure have a relatively high oxidation resistance and are easily cooled because they are positioned near to the
cooling channels 45. - FIGS. 6 and 7 illustrate an alternative embodiment of the invention, in which corresponding reference numerals are used for equivalent parts. In this embodiment the
open cell structure 38 includesupstanding walls 40 which define therebetween a plurality of cells. In this embodiment a small number of generally diamond shapedcells 44 are located at the outer edges of the seal segment. However the majority of thecells 144 form elongate rhomboid shapes when viewed in the radial direction of the turbine. - Various modifications may be made to the above described embodiment without departing from the scope of the invention. The section of the walls illustrated is generally rectangular. However, an “Eiffel tower” section may be used, to improve cooling. In this embodiment, the width of the walls is increased towards their bases, thus providing improved transfer of heat to the
cooling channels 45. - The width of the walls may however be somewhat increased at their radially inner edges, forming a reentrant shape, thus helping to prevent abradable material from becoming detached from the cell structure.
- The open cells need not be diamond or rhomboid shaped, but for example be rectangular, triangular, etc. The cells may be discrete as illustrated, or may interconnect with one another.
- A plurality of closely spaced walls or rails, which may be parallel, may form a seal structure.
- The seal structure may act as a retention matrix for abradable material as described above, or may itself form the seal, with no additional sealing material being used.
- The seal structure need not be formed by electro-discharge machining. Instead, for example, the structure may be cast integrally into the seal segment.
- Subsequent to casting, electrochemical machining or etching may be used to reduce the thickness of the walls in the sealing structure.
- Whilst endeavouring in the foregoing specification to draw attention to those features of the invention believed to be of particular importance it should be understood that the Applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to and/or shown in the drawings whether or not particular emphasis has been placed thereon.
Claims (23)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0008892 | 2000-04-12 | ||
GB0008892.2 | 2000-04-12 | ||
GBGB0008892.2A GB0008892D0 (en) | 2000-04-12 | 2000-04-12 | Abradable seals |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010031201A1 true US20010031201A1 (en) | 2001-10-18 |
US6644914B2 US6644914B2 (en) | 2003-11-11 |
Family
ID=9889678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/815,041 Expired - Lifetime US6644914B2 (en) | 2000-04-12 | 2001-03-23 | Abradable seals |
Country Status (3)
Country | Link |
---|---|
US (1) | US6644914B2 (en) |
EP (1) | EP1146204A3 (en) |
GB (1) | GB0008892D0 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040090013A1 (en) * | 2000-12-01 | 2004-05-13 | Lawer Steven D. | Seal segment for a turbine |
US20080080972A1 (en) * | 2006-09-29 | 2008-04-03 | General Electric Company | Stationary-rotating assemblies having surface features for enhanced containment of fluid flow, and related processes |
US20080298969A1 (en) * | 2007-05-30 | 2008-12-04 | General Electric Company | Stator-rotor assembly having surface feature for enhanced containment of gas flow and related processes |
US20090067997A1 (en) * | 2007-03-05 | 2009-03-12 | Wu Charles C | Gas turbine engine with canted pocket and canted knife edge seal |
US20090304497A1 (en) * | 2006-01-28 | 2009-12-10 | Mtu Aero Engines Gmbh | Guide blade segment of a gas turbine and method for its production |
US20120111521A1 (en) * | 2010-11-05 | 2012-05-10 | Bullied Steven J | Die casting of component having integral seal |
US20130139386A1 (en) * | 2011-12-06 | 2013-06-06 | General Electric Company | Honeycomb construction for abradable angel wing |
US20180209290A1 (en) * | 2017-01-26 | 2018-07-26 | United Technologies Corporation | Gas turbine seal |
US20180355743A1 (en) * | 2015-12-09 | 2018-12-13 | Mitsubishi Hitachi Power Systems, Ltd. | Seal fin, seal structure, turbo machine, and method for manufacturing seal fin |
US20190218925A1 (en) * | 2018-01-18 | 2019-07-18 | General Electric Company | Turbine engine shroud |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0304546D0 (en) * | 2003-02-27 | 2003-04-02 | Rolls Royce Plc | Abradable seals |
US7029232B2 (en) | 2003-02-27 | 2006-04-18 | Rolls-Royce Plc | Abradable seals |
US7871244B2 (en) * | 2007-02-15 | 2011-01-18 | Siemens Energy, Inc. | Ring seal for a turbine engine |
US20080206542A1 (en) * | 2007-02-22 | 2008-08-28 | Siemens Power Generation, Inc. | Ceramic matrix composite abradable via reduction of surface area |
US20080260522A1 (en) * | 2007-04-18 | 2008-10-23 | Ioannis Alvanos | Gas turbine engine with integrated abradable seal and mount plate |
US20080260523A1 (en) * | 2007-04-18 | 2008-10-23 | Ioannis Alvanos | Gas turbine engine with integrated abradable seal |
EP2174740A1 (en) * | 2008-10-08 | 2010-04-14 | Siemens Aktiengesellschaft | Honeycomb seal and method to produce it |
EP2410133A1 (en) * | 2010-07-22 | 2012-01-25 | Siemens Aktiengesellschaft | Gas turbine and method for sealing leakages |
ITCO20110068A1 (en) * | 2011-12-20 | 2013-06-21 | Nuovo Pignone Spa | METHOD AND SEALING WITH HONEYCOMB NEST |
JPWO2014077058A1 (en) * | 2012-11-13 | 2017-01-05 | 三菱重工コンプレッサ株式会社 | Rotating machine |
GB201311460D0 (en) * | 2013-06-27 | 2013-08-14 | Rolls Royce Plc | An abradable liner for a gas turbine engine |
EP2821172B1 (en) * | 2013-07-02 | 2017-04-05 | Carl Freudenberg KG | Method for producing microstructures in seal components |
RU2016134446A (en) * | 2014-02-25 | 2018-03-29 | Сименс Акциенгезелльшафт | THERMAL BARRIER COATING OF A TURBINE COMPONENT WITH MATERIAL PROPERTIES VARIABLE DEPTH |
GB201417307D0 (en) | 2014-10-01 | 2014-11-12 | Rolls Royce Plc | Sealing element |
US10774670B2 (en) | 2017-06-07 | 2020-09-15 | General Electric Company | Filled abradable seal component and associated methods thereof |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB851323A (en) | 1957-11-08 | 1960-10-12 | Gen Motors Corp | Axial-flow compressors and turbines |
US3042365A (en) * | 1957-11-08 | 1962-07-03 | Gen Motors Corp | Blade shrouding |
CA963497A (en) | 1970-12-21 | 1975-02-25 | Gould Inc. | Powder metal honeycomb |
GB2017228B (en) | 1977-07-14 | 1982-05-06 | Pratt & Witney Aircraft Of Can | Shroud for a turbine rotor |
GB2146707B (en) | 1983-09-14 | 1987-08-05 | Rolls Royce | Turbine |
DE3413534A1 (en) * | 1984-04-10 | 1985-10-24 | MTU Motoren- und Turbinen-Union München GmbH, 8000 München | HOUSING OF A FLUID MACHINE |
US4764089A (en) * | 1986-08-07 | 1988-08-16 | Allied-Signal Inc. | Abradable strain-tolerant ceramic coated turbine shroud |
US4884820A (en) | 1987-05-19 | 1989-12-05 | Union Carbide Corporation | Wear resistant, abrasive laser-engraved ceramic or metallic carbide surfaces for rotary labyrinth seal members |
JP3136938B2 (en) | 1995-02-23 | 2001-02-19 | トヨタ自動車株式会社 | Fuel pressure control device |
US5951892A (en) * | 1996-12-10 | 1999-09-14 | Chromalloy Gas Turbine Corporation | Method of making an abradable seal by laser cutting |
-
2000
- 2000-04-12 GB GBGB0008892.2A patent/GB0008892D0/en not_active Ceased
-
2001
- 2001-03-21 EP EP01302627A patent/EP1146204A3/en not_active Withdrawn
- 2001-03-23 US US09/815,041 patent/US6644914B2/en not_active Expired - Lifetime
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6742783B1 (en) * | 2000-12-01 | 2004-06-01 | Rolls-Royce Plc | Seal segment for a turbine |
US20040090013A1 (en) * | 2000-12-01 | 2004-05-13 | Lawer Steven D. | Seal segment for a turbine |
US20090304497A1 (en) * | 2006-01-28 | 2009-12-10 | Mtu Aero Engines Gmbh | Guide blade segment of a gas turbine and method for its production |
US20080080972A1 (en) * | 2006-09-29 | 2008-04-03 | General Electric Company | Stationary-rotating assemblies having surface features for enhanced containment of fluid flow, and related processes |
US8167547B2 (en) * | 2007-03-05 | 2012-05-01 | United Technologies Corporation | Gas turbine engine with canted pocket and canted knife edge seal |
US20090067997A1 (en) * | 2007-03-05 | 2009-03-12 | Wu Charles C | Gas turbine engine with canted pocket and canted knife edge seal |
JP2008298074A (en) * | 2007-05-30 | 2008-12-11 | General Electric Co <Ge> | Stator-rotor assembly having surface characteristic shape part for intensifying gas flow confinement and a method associated with it |
US7967559B2 (en) * | 2007-05-30 | 2011-06-28 | General Electric Company | Stator-rotor assembly having surface feature for enhanced containment of gas flow and related processes |
US20080298969A1 (en) * | 2007-05-30 | 2008-12-04 | General Electric Company | Stator-rotor assembly having surface feature for enhanced containment of gas flow and related processes |
US20120111521A1 (en) * | 2010-11-05 | 2012-05-10 | Bullied Steven J | Die casting of component having integral seal |
US20130139386A1 (en) * | 2011-12-06 | 2013-06-06 | General Electric Company | Honeycomb construction for abradable angel wing |
JP2013119855A (en) * | 2011-12-06 | 2013-06-17 | General Electric Co <Ge> | Honeycomb structure for abradable angel wing |
US20180355743A1 (en) * | 2015-12-09 | 2018-12-13 | Mitsubishi Hitachi Power Systems, Ltd. | Seal fin, seal structure, turbo machine, and method for manufacturing seal fin |
US11105213B2 (en) * | 2015-12-09 | 2021-08-31 | Mitsubishi Power, Ltd. | Seal fin, seal structure, turbo machine, and method for manufacturing seal fin |
US20180209290A1 (en) * | 2017-01-26 | 2018-07-26 | United Technologies Corporation | Gas turbine seal |
US10408077B2 (en) * | 2017-01-26 | 2019-09-10 | United Tehnologies Corporation | Gas turbine seal |
US20190218925A1 (en) * | 2018-01-18 | 2019-07-18 | General Electric Company | Turbine engine shroud |
Also Published As
Publication number | Publication date |
---|---|
EP1146204A3 (en) | 2003-07-23 |
GB0008892D0 (en) | 2000-05-31 |
US6644914B2 (en) | 2003-11-11 |
EP1146204A2 (en) | 2001-10-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6644914B2 (en) | Abradable seals | |
US20080260523A1 (en) | Gas turbine engine with integrated abradable seal | |
EP1985807B1 (en) | Seal for a gas turbine and corresponding manufacturing method | |
US20210003025A1 (en) | Turbine tip shroud assembly with plural shroud segments having inter-segment seal arrangement | |
EP3415720B1 (en) | Turbine tip shroud assembly with plural shroud segments having internal cooling passages | |
EP2636853B1 (en) | Sealing assembly for use in a rotary machine | |
KR0152441B1 (en) | Compressor diaphragm assembly | |
US5096376A (en) | Low windage corrugated seal facing strip | |
US6471213B1 (en) | Seal structure for gas turbine | |
US20100074734A1 (en) | Turbine Seal Assembly | |
US20040265120A1 (en) | Abradable seals | |
US9009965B2 (en) | Method to center locate cutter teeth on shrouded turbine blades | |
US20070212214A1 (en) | Segmented component seal | |
US20090014964A1 (en) | Angled honeycomb seal between turbine rotors and turbine stators in a turbine engine | |
JP2012507657A (en) | Saw wall type turbine nozzle | |
US9903217B2 (en) | Sealing element | |
EP1132576B1 (en) | Turbine shroud comprising an apparatus for minimizing thermal gradients and method for assembling a gas turbine engine including such a shroud | |
US20040009059A1 (en) | Stationary blade in gas turbine and gas turbine comprising the same | |
EP3551851B1 (en) | Turbine element | |
US9206700B2 (en) | Outer vane support ring including a strong back plate in a compressor section of a gas turbine engine | |
US20200157960A1 (en) | Labyrinth seal with variable tooth heights | |
US10822976B2 (en) | Nozzle insert rib cap | |
EP1452696B1 (en) | A method of manufacturing a sealing element | |
JP2016200143A (en) | Gas turbine bucket shanks with seal pins | |
EP3543468A1 (en) | Turbine tip shroud assembly with plural shroud segments having inter-segment seal arrangement |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ROLLS-ROYCE PLC, ENGLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LAWER, STEVEN DAVID;HALLIWELL, MARK ASHLEY;REEL/FRAME:011636/0961;SIGNING DATES FROM 20010308 TO 20010313 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FPAY | Fee payment |
Year of fee payment: 12 |